police are struggling with an 18-year-old, kevin clark. hedgings assaulted someone and refused to -- he just assaulted someone and refused to stop. >> the officers chose to hold him down, he chose that course of action. the officers held him down till backup arrived and then they handcuffed him. >> officers say clark did not -- was not injured and did not need medical treatment. he was sited and let go. live pictures of the situation as protesters are marching down mission street, we believe headed towards the police station at 17th. they are blocking traffic and police are keeping a close eye on things. we have a reporter on the scene as well and we will have full coverage at 10:00 p.m. >>> a terrifying ordeal for a mother and her two children, all three were shut during a home invasion. ktvu's john sasaki joins us now, live from the scene where he was one of two reporters who went inside that home today. john? >> reporter: julie, here is the door, they kicked it in and unleashed gunfire on the family inside. >> my mom's room. she was sle